Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
ton thien » hoan thien, toan thiet, doan thien
tranh cua » doanh cua, manh cua
cua nhung » va nhung
manh toan » thanh toan, anh tuan, tinh toan
van than » van thanh, van thang, van tuan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ton thien thanh - canh tranh cua nhung cong ((van than) or (manh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ton thien thanh - canh tranh cua nhung cong ((van than) OR (manh toan)) cao.
• Adding a wildcard symbol may retrieve word variants: ton thien thanh - canh tranh cua nhung cong ((van than) or (manh toan)) cao*.